Means for connecting the insulating and metal parts of insulators



Jan. 15, 1929.

W. H. GOODMAN MEANS FOR CONNECTING THE INSULATING AND METAL PARTS OF INSULATORS Filed Sept. 4, 1925 Patented Jan. 15, 1929.

UNITED STATES 1,699,141 PATENT OFFICE.

WILLIAM HENRY GOODMAN, OF KENSINGTON, LONDON, ENGLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO DUBILIER CONDENSER CORPORATION.

MEANS FOR CONNECTING THE INSULATING AND METAL PARTS OF INSULATORS.

Application filed September 4, 1925,'Seria1 No.-54,505, and in Great Britain September 4, 1924.

This invention relates to means for connecting or ensuring that-proper connection shall be made between the insulating and metal parts of porcelain or other like insulators and has particular reference to insul'ators such as those described and claimed in British patent specification No. 213,978, complete accepted April 10, 1924.

It is well known that considerable heating.

occurs when bad or imperfect contact is made between the metal and insulating portions of high frequency insulators and great difiiculty has been experienced in malnng good contacts owing to the difficulty in ob-' taining porcelain or other insulators which are perfectly parallel on the connecting surfaces.

The object of the present invention is to provide means for overcoming this difficulty. The invention consists in means for connecting or ensuring that proper connection shall be made between the insulating and metal parts of porcelain or other like insulators, comprising a member such as a fluted orcorrugated metal ring or a metallic ring having irregularities 0 surface, which is ada ted to be placed between the adjacent sur aces of the metal and insulating portions of high frequency insulators in order to maintain intimate contact therebetween.

The said member may be made of comparatively soft metal such as lead, or of hard springy metal such as brass. 4 Y

The invention also consists in insulators such as, for example, are described and claimed in British patent specification No. 213,978 of 1924 having a fluted corrugated metal ring or like member disposed between the body of insulating material and the 40' electrostatic shield adjacent thereto.

The drawing shows in axial section a construction according to my invention.

, In carrying the invention into effect according to one convenient mode, as ap lied to insulators of the type illustrated and described in the British patent specification I referred to, a fluted or corrugated metal ring or like member 2 is placed between the top of the insulator and'the electrostatic shield adjacent thereto, said ring being in contact with two soft metal sheets or rings 1 and 3 which are placed one on each side thereof.

' By the use of'this fluted or corrugated ring any unequal compression-is taken up by the flutes or corrugations and any inequalities or non-parallel conditions of the surface of the porcelain or other insulators are taken care of, while at the same time intimate electrical contact is maintained between the adjacent surfaces of the metal and insulating portions of the insulator.

The body of the insulation is shown at 4 and is made with a flat top 5 with an opening 6 through which passes a conductor rod or stem 7 On this rod is the electrostatic shield 8 in the form of a perforated metal member engaging the rod by means of screw threads 9. The plates or discs 1 and 3 with the interposed washer 2 of uneven surface are between the to 5 of the insulator 4 and the member 8, an when this member 8 is turned up on the threads 9 of the stem 7, it compresses the ring 2 andforces discs 1 and 3 into tight contact with the top 5 of the insulator 4 and its own adjacent surface. The rings 1 and 2, being of soft metal, engage the top 5 and member 8 in continuous contact over their entire surfaces, and the interposed ring or washer 2 compensates for any inequalities of surface or pressure.

While the invention is particularly suitable for use with insulators of the kind described, it is to-be understood that its application is by no means limited to insulators of that type, but is capable of use in insulators and bushings in general. Furthermore, many modifications and changes in details will readily occur to those skilled in the art without departing from the spirit and scope of my invention, and I, therefore, desire to have the foregoing disclosure regarded in the illustrative sense only.

Having now described my invention, what Iclaim as new and desire to secure by Letters Patent is 1. The combination of an insulator, a conductor rod, a conductive member on the rod, and adjacent to the insulator, and means for msuring proper connection between said member and said insulator, said means comprising a pair of relatively soft discs in contact with said insulator and said member respectively, and a washer with an irregular surface between said discs.

2. The combination of an insulator, a conductor rod, a conductive member on the rod, and adjacent to the insulator, and means for insuring proper connection between said member and said insulator, said means comprising a pair of relatively soft discs in 110 contact with said insulator and said member respectively, and a washer with an irregular surface between said discs, the discs being of deformable metal and said washer being yieldable.

3. The combination of an insulator, a conducting rod, a conducting member on the rod and adjacent to the insulator, means for insuring proper connection between said member and said insulator, the said means comprising a pair of relatively soft members in contact with said insulator and said member respectively, and a member having an irregular surface between the relatively soft members.

In testimony whereof I have signed my name to this specification.

WILLIAM HENRY GOODMAN. 

